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29 jul 1927 año - A.A. Michaelson makes most accurate measure of speed of light

Descripción:

2.990 +/- .0002 x 10^8 m/s | [real is about 3x10^8 m/s] | Based on revolving mirrors at the tops of two California mountains

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AP US History

10 may 2018

1

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1508

fecha:

29 jul 1927 año

Ahora mismo

~ 97 years ago

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